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main.go
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main.go
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/*
* NETCAP - Traffic Analysis Framework
* Copyright (c) 2017-2020 Philipp Mieden <dreadl0ck [at] protonmail [dot] ch>
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package main
import (
"encoding/json"
"github.com/dreadl0ck/netcap/encoder"
"io/ioutil"
"os"
"path/filepath"
"strings"
"sync"
"time"
)
// TODO: integrate core functionality into NETCAP and add this tool as cmd/analyze
// we need the following:
// - a model for encoded values and the option to store and load it between multiple executions.
// - encoding strategies to map categorical values into numerical ones
// - normalization strategies
import (
"flag"
"fmt"
"log"
)
// TODO: make configurable
var inputHeader = []string{
"num",
"date",
"time",
"orig",
"type",
"i/f_name",
"i/f_dir",
"src",
"dst",
"proto",
"appi_name",
"proxy_src_ip",
"Modbus_Function_Code",
"Modbus_Function_Description",
"Modbus_Transaction_ID",
"SCADA_Tag",
"Modbus_Value",
"service",
"s_port",
"Tag",
//"Normal/Attack",
}
var inputHeaderLen = len(inputHeader)
// TODO: make configurable
var outputHeader = []string{
"unixtime",
"orig",
"type",
"i/f_name",
"i/f_dir",
"src",
"dst",
"proto",
"appi_name",
"proxy_src_ip",
"modbus_function_code",
"modbus_function_description",
"modbus_transaction_id",
"scada_tag",
"modbus_value",
"service",
"s_port",
"classification",
}
var outputHeaderLen = len(outputHeader)
/*
* Globals
*/
const version = "v0.3.1"
var (
// stats about applied labels
hitMap = make(map[string]int)
hitMapLock sync.Mutex
// attack information for mapping
attacks []*attack
// worker pool
workers []chan task
next int
results = make(map[string]*fileSummary)
resultMutex sync.Mutex
colSums map[string]*encoder.ColumnSummary
)
/*
* Main
*/
func main() {
flag.Parse()
if *flagVersion {
fmt.Println(version)
return
}
if *flagOut != "." {
if _, err := os.Stat(*flagOut); err != nil {
// ensure the directory exists
os.MkdirAll(*flagOut, 0700)
}
}
if *flagAttackList != "" {
attacks = parseAttackList(*flagAttackList)
}
var (
files []string
start = time.Now()
wg sync.WaitGroup
fileFilter []string
)
if *flagFileFilter != "" {
c, err := ioutil.ReadFile(*flagFileFilter)
if err != nil {
log.Fatal(err)
}
fileFilter = strings.Split(string(c), "\n")
}
err := filepath.Walk(*flagInput, func(path string, info os.FileInfo, err error) error {
if strings.HasSuffix(path, *flagPathSuffix) {
if len(fileFilter) != 0 {
if contains(fileFilter, path) {
files = append(files, path)
}
} else {
files = append(files, path)
}
}
if *flagMaxFiles != 0 {
if len(files) == *flagMaxFiles {
return filepath.SkipDir
}
}
return nil
})
if err != nil {
panic(err)
}
totalFiles := len(files)
fmt.Println("started at", time.Now())
fmt.Println("collected", totalFiles, "CSV files for labeling, num workers:", *flagNumWorkers)
fmt.Println("offset", *flagOffset)
fmt.Println("new CSV header:", outputHeader)
fmt.Println("file_suffix", *flagPathSuffix)
fmt.Println("output directory:", *flagOut)
fmt.Println("initializing", *flagNumWorkers, "workers")
// validate offset arg
if *flagOffset >= totalFiles || *flagOffset < 0 {
log.Fatal("invalid value for file offset")
}
// spawn workers
for i := 0; i < *flagNumWorkers; i++ {
workers = append(workers, worker())
}
// set max files
if *flagMaxFiles == 0 {
*flagMaxFiles = len(files)
}
if *flagColumnSummaries != "" {
data, err := ioutil.ReadFile(*flagColumnSummaries)
if err != nil {
log.Fatal(err)
}
err = json.Unmarshal(data, &colSums)
if err != nil {
log.Fatal("failed to unmarshal json", err)
}
fmt.Println("loaded column summaries:", len(colSums))
runLabeling(files, &wg, totalFiles)
fmt.Println("done in", time.Since(start))
return
}
// analyze task
for current, file := range files[*flagOffset:*flagMaxFiles] {
wg.Add(1)
handleTask(task{
typ: typeAnalyze,
file: file,
current: current,
totalFiles: totalFiles,
wg: &wg,
})
}
fmt.Println("started all analysis jobs, waiting...")
wg.Wait()
printAnalysisInfo()
if *flagAnalyzeOnly {
fmt.Println("done in", time.Since(start))
return
}
// run labeling
runLabeling(files, &wg, totalFiles)
fmt.Println("done in", time.Since(start))
}